/**
* Utility method which dynamically binds a Context to the current thread, if none already exists.
*/
public static Object callMethod(
ContextFactory factory,
final Scriptable thisObj,
final Function f,
final Object[] args,
final long argsToWrap) {
if (f == null) {
// See comments in getFunction
return Undefined.instance;
}
if (factory == null) {
factory = ContextFactory.getGlobal();
}
final Scriptable scope = f.getParentScope();
if (argsToWrap == 0) {
return Context.call(factory, f, scope, thisObj, args);
}
Context cx = Context.getCurrentContext();
if (cx != null) {
return doCall(cx, scope, thisObj, f, args, argsToWrap);
} else {
return factory.call(
new ContextAction() {
public Object run(Context cx) {
return doCall(cx, scope, thisObj, f, args, argsToWrap);
}
});
}
}
public static Object convertResult(Object result, Class<?> c) {
if (result == Undefined.instance
&& (c != ScriptRuntime.ObjectClass && c != ScriptRuntime.StringClass)) {
// Avoid an error for an undefined value; return null instead.
return null;
}
return Context.jsToJava(result, c);
}
// Needed by NativeJavaObject de-serializer
public static Object readAdapterObject(Scriptable self, ObjectInputStream in)
throws IOException, ClassNotFoundException {
ContextFactory factory;
Context cx = Context.getCurrentContext();
if (cx != null) {
factory = cx.getFactory();
} else {
factory = null;
}
Class<?> superClass = Class.forName((String) in.readObject());
String[] interfaceNames = (String[]) in.readObject();
Class<?>[] interfaces = new Class[interfaceNames.length];
for (int i = 0; i < interfaceNames.length; i++)
interfaces[i] = Class.forName(interfaceNames[i]);
Scriptable delegee = (Scriptable) in.readObject();
Class<?> adapterClass = getAdapterClass(self, superClass, interfaces, delegee);
Class<?>[] ctorParms = {
ScriptRuntime.ContextFactoryClass,
ScriptRuntime.ScriptableClass,
ScriptRuntime.ScriptableClass
};
Object[] ctorArgs = {factory, delegee, self};
try {
return adapterClass.getConstructor(ctorParms).newInstance(ctorArgs);
} catch (InstantiationException e) {
} catch (IllegalAccessException e) {
} catch (InvocationTargetException e) {
} catch (NoSuchMethodException e) {
}
throw new ClassNotFoundException("adapter");
}
private static Object doCall(
Context cx,
Scriptable scope,
Scriptable thisObj,
Function f,
Object[] args,
long argsToWrap) {
// Wrap the rest of objects
for (int i = 0; i != args.length; ++i) {
if (0 != (argsToWrap & (1 << i))) {
Object arg = args[i];
if (!(arg instanceof Scriptable)) {
args[i] = cx.getWrapFactory().wrap(cx, scope, arg, null);
}
}
}
return f.call(cx, scope, thisObj, args);
}
private static void generateMethod(
ClassFileWriter cfw,
String genName,
String methodName,
Class<?>[] parms,
Class<?> returnType,
boolean convertResult) {
StringBuilder sb = new StringBuilder();
int paramsEnd = appendMethodSignature(parms, returnType, sb);
String methodSignature = sb.toString();
cfw.startMethod(methodName, methodSignature, ClassFileWriter.ACC_PUBLIC);
// Prepare stack to call method
// push factory
cfw.add(ByteCode.ALOAD_0);
cfw.add(ByteCode.GETFIELD, genName, "factory", "Laurora/javascript/ContextFactory;");
// push self
cfw.add(ByteCode.ALOAD_0);
cfw.add(ByteCode.GETFIELD, genName, "self", "Laurora/javascript/Scriptable;");
// push function
cfw.add(ByteCode.ALOAD_0);
cfw.add(ByteCode.GETFIELD, genName, "delegee", "Laurora/javascript/Scriptable;");
cfw.addPush(methodName);
cfw.addInvoke(
ByteCode.INVOKESTATIC,
"aurora/javascript/JavaAdapter",
"getFunction",
"(Laurora/javascript/Scriptable;" + "Ljava/lang/String;" + ")Laurora/javascript/Function;");
// push arguments
generatePushWrappedArgs(cfw, parms, parms.length);
// push bits to indicate which parameters should be wrapped
if (parms.length > 64) {
// If it will be an issue, then passing a static boolean array
// can be an option, but for now using simple bitmask
throw Context.reportRuntimeError0(
"JavaAdapter can not subclass methods with more then" + " 64 arguments.");
}
long convertionMask = 0;
for (int i = 0; i != parms.length; ++i) {
if (!parms[i].isPrimitive()) {
convertionMask |= (1 << i);
}
}
cfw.addPush(convertionMask);
// go through utility method, which creates a Context to run the
// method in.
cfw.addInvoke(
ByteCode.INVOKESTATIC,
"aurora/javascript/JavaAdapter",
"callMethod",
"(Laurora/javascript/ContextFactory;"
+ "Laurora/javascript/Scriptable;"
+ "Laurora/javascript/Function;"
+ "[Ljava/lang/Object;"
+ "J"
+ ")Ljava/lang/Object;");
generateReturnResult(cfw, returnType, convertResult);
cfw.stopMethod((short) paramsEnd);
}
static Object js_createAdapter(Context cx, Scriptable scope, Object[] args) {
int N = args.length;
if (N == 0) {
throw ScriptRuntime.typeError0("msg.adapter.zero.args");
}
// Expected arguments:
// Any number of NativeJavaClass objects representing the super-class
// and/or interfaces to implement, followed by one NativeObject providing
// the implementation, followed by any number of arguments to pass on
// to the (super-class) constructor.
int classCount;
for (classCount = 0; classCount < N - 1; classCount++) {
Object arg = args[classCount];
// We explicitly test for NativeObject here since checking for
// instanceof ScriptableObject or !(instanceof NativeJavaClass)
// would fail for a Java class that isn't found in the class path
// as NativeJavaPackage extends ScriptableObject.
if (arg instanceof NativeObject) {
break;
}
if (!(arg instanceof NativeJavaClass)) {
throw ScriptRuntime.typeError2(
"msg.not.java.class.arg", String.valueOf(classCount), ScriptRuntime.toString(arg));
}
}
Class<?> superClass = null;
Class<?>[] intfs = new Class[classCount];
int interfaceCount = 0;
for (int i = 0; i < classCount; ++i) {
Class<?> c = ((NativeJavaClass) args[i]).getClassObject();
if (!c.isInterface()) {
if (superClass != null) {
throw ScriptRuntime.typeError2("msg.only.one.super", superClass.getName(), c.getName());
}
superClass = c;
} else {
intfs[interfaceCount++] = c;
}
}
if (superClass == null) {
superClass = ScriptRuntime.ObjectClass;
}
Class<?>[] interfaces = new Class[interfaceCount];
System.arraycopy(intfs, 0, interfaces, 0, interfaceCount);
// next argument is implementation, must be scriptable
Scriptable obj = ScriptableObject.ensureScriptable(args[classCount]);
Class<?> adapterClass = getAdapterClass(scope, superClass, interfaces, obj);
Object adapter;
int argsCount = N - classCount - 1;
try {
if (argsCount > 0) {
// Arguments contain parameters for super-class constructor.
// We use the generic Java method lookup logic to find and
// invoke the right constructor.
Object[] ctorArgs = new Object[argsCount + 2];
ctorArgs[0] = obj;
ctorArgs[1] = cx.getFactory();
System.arraycopy(args, classCount + 1, ctorArgs, 2, argsCount);
// TODO: cache class wrapper?
NativeJavaClass classWrapper = new NativeJavaClass(scope, adapterClass, true);
NativeJavaMethod ctors = classWrapper.members.ctors;
int index = ctors.findCachedFunction(cx, ctorArgs);
if (index < 0) {
String sig = NativeJavaMethod.scriptSignature(args);
throw Context.reportRuntimeError2("msg.no.java.ctor", adapterClass.getName(), sig);
}
// Found the constructor, so try invoking it.
adapter = NativeJavaClass.constructInternal(ctorArgs, ctors.methods[index]);
} else {
Class<?>[] ctorParms = {ScriptRuntime.ScriptableClass, ScriptRuntime.ContextFactoryClass};
Object[] ctorArgs = {obj, cx.getFactory()};
adapter = adapterClass.getConstructor(ctorParms).newInstance(ctorArgs);
}
Object self = getAdapterSelf(adapterClass, adapter);
// Return unwrapped JavaAdapter if it implements Scriptable
if (self instanceof Wrapper) {
Object unwrapped = ((Wrapper) self).unwrap();
if (unwrapped instanceof Scriptable) {
if (unwrapped instanceof ScriptableObject) {
ScriptRuntime.setObjectProtoAndParent((ScriptableObject) unwrapped, scope);
}
return unwrapped;
}
}
return self;
} catch (Exception ex) {
throw Context.throwAsScriptRuntimeEx(ex);
}
}
